c# - Convert async lambda expression to delegate type System.Func? -

I have an async method inside a portable class library with this signature:

  Private async Tasks & LT; T & gt; _Fetch & lt; T & gt; (Uri Uri)   
 This is a resource which is inserted as a solid type T.  
 I am working with a 3rd party cache library () for which  Func & lt; as one of the parameters. T & gt;  and have tried to do this like this:  
  is waiting for this. CacheProvider.GetOrCreateObject & lt; T & gt; (Key, Async () => Wait & gt; T & gt; (Yuri), Cache XPri);   
 Result in this error:  
 
 Type ' System.Func & lt; T & gt; Async lambda expression can not be changed to represent  '. An async lambda expression  zero ,  work  or  work & lt; T & gt; , of which none of the ' System.Func & lt; T & gt;  '.   
 I have  Func & lt; T & gt;  Has tried different versions of assignments, only one way I can get the code to work  Func & lt; T & gt;  Interception:  
  Waiting for this. CacheProvider.GetOrCreateObject & lt; T & gt; (Key, () => _Fetch & lt; T & gt; (Yuri). Result, cache expiry);   
 That's deadlock my app.  
 Any sign where I am wandering?   
 
 
 can not be used when someone calls  funk & lt; T & gt; F  You can assume that it will be applied with something like  result = F ()  - it does not know about ASCIC behavior if you use it by using  Cheat. As the result you have - this will be a deadlock on the UI thread because it wants to schedule the code on the UI thread  wait  (_Fetch), but you already have the . With it has blocked it. Result .  
 Async Lambda can be passed on to  Action  because it has no return value - or  function & lt; Work & gt;  or  function & lt; Work & lt; T & gt; & Gt; .  
 Seeing your case, Calling GetOrCreateObject  appears to be  GetOrFetchObject . One of the  GetOrFetchObject  overload  Func & lt; Work & lt; T & gt; & Gt;  accepts. You can try calling that method with your Async Lambda and see what it helps.